Trajectories of sleepiness and insomnia symptoms in Norwegian nurses with and without night work and rotational work

Baseline values of sleepiness and insomnia were higher among rotational shift workers than those with fixed shifts.

• Longitudinal data collected from Norwegian nurses over four to five years assessed sleepiness and insomnia.
• Night work and entering night work did not show different trajectories for sleepiness or insomnia compared to not having night work.
• Similarly, rotational work and entering rotational work did not lead to different trajectories for sleepiness or insomnia symptoms.
• Leaving night work or rotational work was associated with a decrease in sleepiness and insomnia symptoms.

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